Biomechanics of transvertebral screw fixation in the thoracic spine: an in vitro study

尸体痉挛 医学 固定(群体遗传学) 运动范围 胸椎 生物力学 胸椎 口腔正畸科 解剖 外科 核医学 腰椎 腰椎 人口 环境卫生
作者
Nestor G. Rodriguez-Martinez,Amey Savardekar,Eric Nottmeier,Stephen M. Pirris,Phillip M. Reyes,Anna G.U.S. Newcomb,George Mendes,Samuel Kalb,Nicholas Theodore,Neil R. Crawford
出处
期刊:Journal of neurosurgery [Journal of Neurosurgery Publishing Group]
卷期号:25 (2): 187-192 被引量:14
标识
DOI:10.3171/2015.11.spine15562
摘要

OBJECTIVE Transvertebral screws provide stability in thoracic spinal fixation surgeries, with their use mainly limited to patients who require a pedicle screw salvage technique. However, the biomechanical impact of transvertebral screws alone, when they are inserted across 2 vertebral bodies, has not been studied. In this study, the authors assessed the stability offered by a transvertebral screw construct for posterior instrumentation and compared its biomechanical performance to that of standard bilateral pedicle screw and rod (PSR) fixation. METHODS Fourteen fresh human cadaveric thoracic spine segments from T-6 to T-11 were divided into 2 groups with similar ages and bone quality. Group 1 received transvertebral screws across 2 levels without rods and subsequently with interconnecting bilateral rods at 3 levels (T8–10). Group 2 received bilateral PSR fixation and were sequentially tested with interconnecting rods at T7–8 and T9–10, at T8–9, and at T8–10. Flexibility tests were performed on intact and instrumented specimens in both groups. Presurgical and postsurgical O-arm 3D images were obtained to verify screw placement. RESULTS The mean range of motion (ROM) per motion segment with transvertebral screws spanning 2 levels compared with the intact condition was 66% of the mean intact ROM during flexion-extension (p = 0.013), 69% during lateral bending (p = 0.015), and 47% during axial rotation (p < 0.001). The mean ROM per motion segment with PSR spanning 2 levels compared with the intact condition was 38% of the mean intact ROM during flexion-extension (p < 0.001), 57% during lateral bending (p = 0.007), and 27% during axial rotation (p < 0.001). Adding bilateral rods to the 3 levels with transvertebral screws decreased the mean ROM per motion segment to 28% of intact ROM during flexion-extension (p < 0.001), 37% during lateral bending (p < 0.001), and 30% during axial rotation (p < 0.001). The mean ROM per motion segment for PSR spanning 3 levels was 21% of intact ROM during flexion-extension (p < 0.001), 33% during lateral bending (p < 0.001), and 22% during axial rotation (p < 0.001). CONCLUSIONS Biomechanically, fixation with a novel technique in the thoracic spine involving transvertebral screws showed restoration of stability to well within the stability provided by PSR fixation.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
hanleiharry1发布了新的文献求助10
刚刚
天峰完成签到,获得积分10
刚刚
李健应助风趣的爆米花采纳,获得10
1秒前
FashionBoy应助无名采纳,获得10
2秒前
超级的丸子完成签到,获得积分10
3秒前
4秒前
隐形曼青应助murry123采纳,获得10
5秒前
ANG完成签到 ,获得积分10
5秒前
6秒前
李嘉欣发布了新的文献求助10
7秒前
7秒前
lascqy完成签到 ,获得积分10
8秒前
wbh发布了新的文献求助10
9秒前
JamesPei应助咚咚咚采纳,获得30
10秒前
小熊熊完成签到,获得积分10
11秒前
Tessa完成签到,获得积分10
11秒前
王心耳完成签到,获得积分10
12秒前
扁舟灬完成签到,获得积分10
12秒前
周婷发布了新的文献求助10
12秒前
12秒前
puff关注了科研通微信公众号
13秒前
13秒前
15秒前
稳重岩完成签到 ,获得积分10
17秒前
loski发布了新的文献求助10
18秒前
步一发布了新的文献求助10
18秒前
19秒前
19秒前
hanleiharry1发布了新的文献求助10
19秒前
19秒前
murry123发布了新的文献求助10
20秒前
痴情的寒云完成签到 ,获得积分10
20秒前
CAOHOU应助张wx_100采纳,获得10
21秒前
22秒前
ppg123应助NightGlow采纳,获得10
23秒前
23秒前
24秒前
emmm发布了新的文献求助10
25秒前
顾矜应助wbh采纳,获得10
26秒前
无辜的夏山完成签到,获得积分10
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989390
求助须知:如何正确求助?哪些是违规求助? 3531487
关于积分的说明 11254109
捐赠科研通 3270153
什么是DOI,文献DOI怎么找? 1804887
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809174